Characterization of Single-mode Fiber Coupling at the Large Binocular Telescope
Characterization of Single-mode Fiber Coupling at the Large Binocular Telescope
复制标题
大型双目望远镜单模光纤耦合的表征
DOI:
10.1088/1538-3873/ab42cb
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发表时间:
2020
影响因子:
3.5
通讯作者:
Bechter, Eric B.
中科院分区:
文献类型:
--
作者:
Bechter, Andrew J.;Crass, Jonathan;Tesch, Jonathan;Crepp, Justin R.;Bechter, Eric B.
Optimizing on-sky single-mode fiber (SMF) injection is an essential part of developing precise Doppler spectrometers and new astrophotonics technologies. We installed and tested a prototype SMF-injection system at the Large Binocular Telescope in 2016 April. The fiber injection unit was built as part of the derisking process for a new instrument named iLocater that will use adaptive optics (AO) to feed a high resolution, near-infrared spectrograph. In this paper we report Y-band SMF coupling measurements for bright, M-type stars. We compare theoretical expectations for delivered Strehl ratio and SMF coupling to experimental results, and evaluate fundamental effects that limit injection efficiency. We find the pupil geometry of the telescope itself limits fiber coupling to a maximum efficiency of ρ tel≈ 0.78. Further analysis shows the individual impact of AO correction, tip-tilt residuals, and static (noncommon-path) aberrations contribute coupling coefficients of ρ Strehl≈ 0.33,
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DOI:
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发表时间:
2003
期刊:
SPIE Astronomical Telescopes + Instrumentation
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发表时间:
2015
期刊:
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